21767140

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{877}}^1$

素因数の和:976

約数の個数: 48

約数和(自身を含む): 49118832

約数和(自身を除く): 27351692

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 73, 85, 146, 170, 292, 340, 365, 730, 877, 1241, 1460, 1754, 2482, 3508, 4385, 4964, 6205, 8770, 12410, 14909, 17540, 24820, 29818, 59636, 64021, 74545, 128042, 149090, 256084, 298180, 320105, 640210, 1088357, 1280420, 2176714, 4353428, 5441785, 10883570, 21767140]

約数ペア:

[(1, 21767140), (2, 10883570), (4, 5441785), (5, 4353428), (10, 2176714), (17, 1280420), (20, 1088357), (34, 640210), (68, 320105), (73, 298180), (85, 256084), (146, 149090), (170, 128042), (292, 74545), (340, 64021), (365, 59636), (730, 29818), (877, 24820), (1241, 17540), (1460, 14909), (1754, 12410), (2482, 8770), (3508, 6205), (4385, 4964)]